1、计算log5^35+2log1/2^根号2-log5^1/50-log5^14 2、已知log3^7=a,log2^3=b,求log21^28
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1、计算log5^35+2log1/2^根号2-log5^1/50-log5^14 2、已知log3^7=a,log2^3=b,求log21^28
1、计算log5^35+2log1/2^根号2-log5^1/50-log5^14
2、已知log3^7=a,log2^3=b,求log21^28
1、计算log5^35+2log1/2^根号2-log5^1/50-log5^14 2、已知log3^7=a,log2^3=b,求log21^28
log5(35)+2log1/2^(√2)-log5(1/50)-log5(14)
=log5(35)-log5(1/50)-log5(14)+log1/2[(√2)²]
=log5(35÷1/50÷14)+log1/2(2)
=log5(125)+log1/2(2)
=log5(5³)+log1/2[1/2^(-1)]
=3-1=2
log21^28=lg28/lg21
=lg(2²×7)/lg(3×7)
=(2lg2+lg7)/(lg3+lg7)
∵log3^7=a,log2^3=b,∴lg7/lg3=a,lg3/lg2=b
∴lg7/lg2=lg7/lg3×lg3/lg2=ab
∴lg7=ablg2=alg3,lg3=blg2
∴原式=(2lg2+ablg2)/(blg2+ablg2)
=2+ab/b+ab
计算Log5 35+2log1/2√2-log5 1/50-log5 14急急急!!!
Log5^35+2log1/2^√2-log5^1/50-log5^14求值
1、计算log5^35+2log1/2^根号2-log5^1/50-log5^14 2、已知log3^7=a,log2^3=b,求log21^28
对数 log5(35)+2log1/2( 根号2)-log5(1/50)-log5(14)log5(35)+2log1/2( 根号2)-log5(1/50)-log5(14)
计算(2lg5^2+log5^3)/(log5^10+0.5log5^0.36+1/3log5^8)
计算2log5^10+log5^0.25=
2log5 10+log5 0.25 怎样计算,
log2(2)+log5(1)-log1/3(1/27)+[3^log3(5)]^2+3^-log3(2)=?
log5 2+log5 3+log5 1/6=?
计算:log5为底35的对数-2log5为底3分之7的对数+log5为底7的对数-log5为底1.8的对数
怎样计算(log2)^2+(log5)^2+(2*log2)*log5
计算:2log5 10+log5 0.25=______
log5【35】-2log5[7/3】+log5【7】-log5【1.8】 化简
log5(35)-2log5(7/3)+log5(7)-log5(1.8)
比较log2^(1/3),log1/3^2,log5^2的大小速度,谢了!
比较下列各数的大小:2^0.7,log5(4),log1/3(5),log3(1/4),log4(1/3),
计算:2log5 10+log5 0.25+5log5 25 (都是以5为底的.)
高一数学,log5^3=a,log5^2=b,用a、b表示,log1.5^2.4